Following President Donald Trump's escalating attacks on the press, Republican Sen. Ben Sasse is questioning if the president's recent threat to go after media licenses is a betrayal of the First Amendment.

“Mr. President: Words spoken by the President of the United States matter,” Sasse wrote in a statement. “Are you tonight recanting of the oath you took on January 20th to preserve, protect, and defend the First Amendment?”

On Wednesday, the president threatened to look into revoking NBC News's broadcasting license over multiple reports seemingly painting the administration in a chaotic light.

“And it's frankly disgusting the press is able to write whatever they want to write, and people should look into it,” Trump told reporters.

But Sasse isn't the only Republican lawmaker pushing back on the president's attacks on the media. Rep. Carlos Curbelo (R-Fla.) appeared to endorse the Nebraska senator questioning Trump's loyalty to the First Amendment, retweeting his critical statement.

Speaker of the House Paul Ryan (R-Wis.) also threw his weight behind the press's First Amendment rights: “I don’t always agree and like what you guys write, but you have your right to do it.”

Sasse has a history of speaking out against the president, recently slamming Trump for having a “18th-century views of trade as a zero-sum game.”